private boolean isGropTableFilter(TableFilter filter) {
TableMate table1 = (TableMate) filter.getTable();
for (TableFilter item : filters) {
if (item == filter || isNestedJoinTable(item)) {
continue;
}
TableMate table2 = (TableMate) item.getTable();
TableRule rule1 = table1.getTableRule();
TableRule rule2 = table2.getTableRule();
if (!rule1.isNodeComparable(rule2)) {
return false;
}
}
return true;
}
private RoutingResult doRoute(Select prepare) {
List<TableFilter> filters = filterNotTableMate(prepare.getTopTableFilter());
List<TableFilter> shards = New.arrayList(filters.size());
List<TableFilter> globals = New.arrayList(filters.size());
List<TableFilter> fixeds = New.arrayList(filters.size());
for (TableFilter tf : filters) {
TableMate table = getTableMate(tf);
switch (table.getTableRule().getType()) {
case TableRule.SHARDED_NODE_TABLE:
shards.add(tf);
break;
case TableRule.GLOBAL_NODE_TABLE:
globals.add(tf);
break;
case TableRule.FIXED_NODE_TABLE:
fixeds.add(tf);
break;
default:
break;
}
}
RoutingResult result = null;
if (!shards.isEmpty()) {
for (TableFilter f : shards) {
f.setEvaluatable(f, false);
if (f.isJoinOuter() || f.isJoinOuterIndirect()) {
prepare.getCondition().createIndexConditions(session, f);
}
TableMate table = getTableMate(f);
ConditionExtractor extractor = new ConditionExtractor(f);
RoutingResult r =
routingHandler.doRoute(
table, extractor.getStart(), extractor.getEnd(), extractor.getInColumns());
result = (result == null || r.compareTo(result) < 0) ? r : result;
}
for (TableFilter f : shards) {
f.setEvaluatable(f, true);
}
} else if (!fixeds.isEmpty()) {
for (TableFilter tf : shards) {
TableMate table = getTableMate(tf);
RoutingResult r = routingHandler.doRoute(table);
result = r;
}
} else if (!globals.isEmpty()) {
// 全部为全局表查询，随机取一个第一个表结点
GlobalTableRule tableRule = (GlobalTableRule) getTableRule(globals.iterator().next());
RoutingResult r = tableRule.getRandomRoutingResult();
result = r;
} else {
throw DbException.throwInternalError("SQL_ROUTING_ERROR");
}
ObjectNode[] selectNodes = result.getSelectNodes();
if (selectNodes.length == 0) {
throw DbException.throwInternalError("SQL_ROUTING_ERROR,empty result");
}
setConsistencyTableNodes(selectNodes, filters);
return result;
}
private void setConsistencyTableNodes(ObjectNode[] selectNodes, List<TableFilter> filters) {
this.consistencyTableNodes = New.hashMapNonRehash(selectNodes.length);
for (ObjectNode target : selectNodes) {
HashMap<TableFilter, ObjectNode> tableNodeMapping = New.hashMapNonRehash(filters.size());
for (TableFilter tf : filters) {
TableMate table = getTableMate(tf);
ObjectNode consistencyNode = getConsistencyNode(table.getTableRule(), target);
tableNodeMapping.put(tf, consistencyNode);
}
consistencyTableNodes.put(target, tableNodeMapping);
}
}